Coffee urn bag



Dec'. 6, 1932. c. A. RUNDQUIST 1,889,845

' COFFEE URN BAG Filed April 4. 19 32 1710871167.- CarZ' CZ. Rundquzlsi- Patented Dec. 6, 1932 UNITED STATES PATENT OFFICE CARL A. RUNDQ'UIST, OF'CHIGAGQIILLINQIS COFFEE mm IB'AG Application filed April 4, 1932. Serial no. 603,012.

and the bag units must be inexpensive and yet properly shaped to present a substantial circular mouthwhen distended with a minimum of flutings,.tucks and other 'irregularitiesldiflicult of cleansing.

These bags are ordinarily made by sewing together two of the diagonal edges of trianper edge about the open mouth turned over on the inside to form a reinforcing hem which f v p I slve and much more satlsfactory than filter also receives the clamping ring. Such con- .aninterior that is not symmetrical.

Even if, as is sometimes done, the triangular pieces of material have the upper edges trlmmed along an arcuate l1ne 1n order to make a truly circular distended mouth, the

inturned portion of the hem being of greater fiutings which are notsanitary. I V

In either instance the line of pull in one portion is straight with the threads of the material and in other portions the pull is on the bias, resulting in distortion;- and while in the first example the hem may extend uniformly relative to the weave, in the second instancethe hem itselfextends in non-uniform bias relation to the fabric threads.

, angular shape and sewed together along two sides. The upper edge defining the opening is out along an arcuate line to present a truly circular'mouth when distended. However,

as the curved edge extends'non-uniformly relative to the warp and weft threads of the material, the edge is not turned over but a gular shaped pieces of filter cloth and the up- V struction is objectionable in that the mouth of the bag when distended is not truly circular and at the seams is of greater depth, leaving I the band and bag proper; and By my invention the fabric is cut in triseparate ring-receiving band is provided, the

threads of which extend longitudinally and transversely throughout the length. The edges of the band are. reverselyfoldedinwardly to embrace the raw edge of the bag and are stitched thereto, or they may benot only inturned to embrace the bagedge but the edges of the bag and of the band may be interlocked byv a felledseam, or such other form of seam connection may be employed as will securely unite them without puckera ing or fiuting.

Thus, while the threads of the bag in some portions bear a bias relation to the band,the band uniformly resists downward pull'thereon and the connection between the band and the bag proper isso securedand their relation such that but a minimum of distortion of the bag can occur." There are no inequalities of the hem providing pockets for the collection of sediment and'the whole is easily cleansed and sanitary. The bag isinexpenture's' characterizing the invention, a preferred embodiment of the same is set forth in the accompanying drawing by way of example. I

In the drawing, Fig. 1 is a front elevation of the bagafter stitching but in flat condition, the line of fold corresponding. to that of the seam at the Fig. 2 is. a similar view atright angles to Fig. 1;

l Fig. 3 is a fragmentary enlarged'view illustrating the relation between the threads of the band and the body'portion;

Fig. 4 is a section on the line 4c4.- of Fig. 1 illustrating one form of. connection between weft threads 11 and 12 of the material forming the body 13 extend respectively in a vertical and horizontal direction, the relation ship between the threads of the body portion tions of its length and in other portions di agonally thereof, and as a consequence this supporting hem will be of unequal resistance throughout ,to vertical pull, permitting the bag to lose its shape disadvantageously; and

- if, 'onthe other hand, the joined pieces of material forming the bag body are out along the free edges in a straight line in order that the threads of the hem may extend uniformly relative to its length, in that event the folding over'of the material to form the hem will necessarily cause gathers on the inside of the bag which would be: unsanitary, and, moreover, the bag will not be symmetrical, the walls along the stitched edges being of greater extent than at a'point intermediate the same. I

.By my invention these objections are obviated to the greatest practicable extent in that the reinforcing band 14 is entirely separate and apart from the body material 13 until it is turned and stitched thereto. As the warp threads 18 of the band extend longitudinally of the band and the weft threads 19 extend transversely ofthe band throughout, eliminating bias relationship, the band uniformly presents resistance to distortion and the material of the bag, even in its bias portions, is securely held against distortion and will give uniform filtering action throughout.

The band may be attached to the bag material in different ways, but I have found the form of seam shown in Fig. 4: to be admirably adapted to the purpose. Therein the band 14 is folded medially of its width with its edges lta inturned upon themselves to embrace the upper edge 13a of the bag material and, is then stitched through as indicated at 20.

A clamping wire 21 is threaded through the loop made by the foldedband 14 and serves to clamp and support the same within the mouth of the urn, as is usual practice.

In Fig. 5 another form of seam is shown wherein the band is folded in the precise manner as set forth in Fig. 4 but the raw edge 13a of the bag material is itself folded around one of the edges lela and stitched through at 20 whereby a secure felled seam is produced.

I claim:

1. A filter. bag for urns comprising a body portion of generally conical shape and having a substantially circular open mouth, and a supporting band extending circumferentially of the mouth and stitched to the fabric of the bag, said band adapted to be engaged by a clamping ring for supporting the bag in the urn, the threads in the band extending longitudinally and transversely of the band and the threads of the bag extending in some portions parallel to the threads of the band with a gradual divergence therefrom in other portions towards a, bias relationship.

2. A filter bag for urns comprising a body portion of generally conical shape and having a substantially circular open mouth, and a supporting band extending circumferenti'ally of the mouth and stitchedvto the fabric of the bag, said band adapted to be engaged by a clamping ring for supporting the bag in the urn, the warp threads in the band extending longitudinally of the band, and the warp threads of the bag extending in some portions normal to the warp threads of the band with a gradual divergence therefrom in other portions towards a biasrelationship.

3. A filter bag for urns comprising a body portion of generally inverted conical shape and having a substantially circular open mouth, and a separate supporting. band extending circumferentially of the mouth with its edges reversely turned upon themselves to embrace and stitched to the fabric of the bag, said band adapted to receive internally a clamping ring for supporting the bag in the urn, the warp and weft threads in the band extending longitudinally and transversely of the band and the'warp and weft threads of the bag extending in some portions normal and parallel to the corresponding threads of the band with a gradual divergence therefrom in otherportions towards a bias rela-" tionship. V

4. A filter bag for urns comprising generally triangular pieces of fabric stitched together along two sides to form a body portion of generally conical shape when distended and presenting a substantially circular open mouth, a band of material in which the warp and weft threads extend longitudinally and transversely-of its length,

said' band folded medially of its width and having its marginal edges inturned upon themselves to embrace and stitched to the raw marginal edge of the body portion, the band adapted to receive internally a distending and clamping ring for supporting the bag in the urn.

5. A filter bag for urns comprising generally triangular pieces of fabric stitched together along two sides to form a body por tion of generally conical shape when distended and presenting a substantially circular open mouth, a band of materialin which the warp and weft threads extend longitudinally and transversely of its length, said band folded medially of its width and having its marginal edges stitched to the raw marginal edge of the body portion, the band adapted to receive internally a. distending and clamping ring for supporting the bag in the'urn.

In testimony whereof I have hereunto subscribed my name.

CARL A. RU'N'DQUIST. 

